3.02 Grundlagen der Festigkeitslehre Flashcards

1
Q

Wieviele Spannungen gibt es?

A

2

Normalspannung und Schubspannung

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2
Q

Umrechnung 10^6 Pa

A

10^6 Pa = 10^6 N/m^2 = 1 MPa = 1 N/mm^2 = 0,1 kN/cm^2

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3
Q

Formel Hooke’sches Gesetz

A

Sigma = E * Epsilon

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4
Q

Formel Schubmodul

A

G = E / 2 * (1 + mü)

ungefähr 1/3 vom E-Modul

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5
Q

Sigma Formeln infolge Biegebeanspruchung

A
  1. Sigma_x = ( M_y / I_y ) * z

2. Sigma_x,max = M_y / W_y

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6
Q

Sigma Formel Normalkraft und Biegemoment

A

Sigma_x = N_x / A +- (M_y / I_y) * z

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7
Q

Formel Schubspannung

A

Tau_xy = Tau_yx = ( V_z * S_y ) / ( I_y * t )

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8
Q

Formel Schubspannung bei Rechteck

A

Tau_xy = Tau_yx = 1,5 * ( V_z / A )

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9
Q

Formel statisches Moment, Flächenmoment 1. Grades

A

S_y = A_s * e_s,z
A_s: Fläche
e_s,z: Abstand Fläche A zum Gesamtschwerpunkt

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10
Q

Nicht wölbfreie und wölbfreie Querschnitte

A

Bild einfügen

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11
Q

Was berücksichtigt der Korrekturwert eta?

A

Die Ausrundungen bei Walzprofilen. Er kann bis zu 1,33 für gewalzte IPE-Profile annehmen.

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12
Q

Welche Profile sind zum Abtragen von Torsion vorzuziehen?

A

geschlossene Profilquerschnitte

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13
Q

Formel Schubspannung bei I-Profil

A

Tau_xz = Tau_zx = V_z / A_Steg

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